private void UpdateGeometry(string operation, double segmentLength, double deviation)
{
// Start with the original polyline.
Polyline polyline = _originalPolyline;
// Apply the selected operation.
if (operation == "Generalize")
{
// Reset the other slider.
_segmentLengthSlider.Progress = 0;
polyline = (Polyline)GeometryEngine.Generalize(polyline, deviation, true);
// Update the result label.
_resultLabel.Text = $"Operation: Generalize, Deviation: {deviation:f}";
}
else
{
// Reset the other slider.
_deviationSlider.Progress = 0;
polyline = (Polyline)GeometryEngine.Densify(polyline, segmentLength);
// Update the result label.
_resultLabel.Text = $"Operation: Densify, Segment length: {segmentLength:f}";
}
// Update the graphic geometries to show the results.
_resultPolylineGraphic.Geometry = polyline;
_resultPointGraphic.Geometry = new Multipoint(polyline.Parts.SelectMany(m => m.Points));
}
private void OnUIChanged(object sender, EventArgs e)
{
// Start with the original polyline.
Polyline polyline = _originalPolyline;
// Reset the slider if the operation is changed.
if (sender is UISegmentedControl)
{
_slider.Value = 100.0F;
}
// Apply the selected operation.
if (_operationPicker.SelectedSegment == 0)
{
polyline = (Polyline)GeometryEngine.Densify(polyline, _slider.Value);
// Update the result label.
_resultLabel.Text = $"Densify - Segment length: {_slider.Value:f}";
}
else
{
polyline = (Polyline)GeometryEngine.Generalize(polyline, _slider.Value, true);
// Update the result label.
_resultLabel.Text = $"Generalize - Deviation: {_slider.Value:f}";
}
// Update the graphic geometries to show the results.
_resultPolylineGraphic.Geometry = polyline;
_resultPointGraphic.Geometry = new Multipoint(polyline.Parts.SelectMany(m => m.Points));
}
// Generalizes the original line graphic
private void GeneralizeButton_Click(object sender, RoutedEventArgs e)
{
try
{
_generalizedGraphicsOverlay.Graphics.Clear();
var offset = DistanceSlider.Value * 1000;
var generalizedPolyline = GeometryEngine.Generalize(
_originalGraphicsOverlay.Graphics[0].Geometry, offset, false) as Polyline;
if (generalizedPolyline != null)
{
var graphic = new Graphic(generalizedPolyline, _generalizedLineSymbol);
_generalizedGraphicsOverlay.Graphics.Add(graphic);
foreach (var part in generalizedPolyline.Parts)
{
foreach (var point in part.GetPoints())
{
var vertex = new Graphic(point, _generalizedMarkerSymbol);
_generalizedGraphicsOverlay.Graphics.Add(vertex);
}
}
}
}
catch (Exception ex)
{
MessageBox.Show("Error generalizing line: " + ex.Message, "Generalize Sample");
}
}
private void UpdateGeometry(string operation, double value)
{
// Start with the original polyline.
Polyline polyline = _originalPolyline;
// Apply the selected operation.
if (operation == "Generalize")
{
polyline = (Polyline)GeometryEngine.Generalize(polyline, value, true);
// Update the result label.
_resultLabel.Text = $"Generalize - Deviation: {value:f}";
}
else
{
polyline = (Polyline)GeometryEngine.Densify(polyline, value);
// Update the result label.
_resultLabel.Text = $"Densify - Segment length: {value:f}";
}
// Update the graphic geometries to show the results.
_resultPolylineGraphic.Geometry = polyline;
_resultPointGraphic.Geometry = new Multipoint(polyline.Parts.SelectMany(m => m.Points));
}
private void GeneralizeButton_Click(object sender, RoutedEventArgs e)
{
try
{
generalizedGraphicsLayer.Graphics.Clear();
var offset = DistanceSlider.Value * 1000;
var generalizedGeometry = GeometryEngine.Generalize(originalGraphicsLayer.Graphics[0].Geometry, offset, false);
if (generalizedGeometry != null)
{
var g = new Graphic(generalizedGeometry, generalizedLineSymbol);
generalizedGraphicsLayer.Graphics.Add(g);
foreach (var part in (generalizedGeometry as Polyline).Parts)
{
foreach (var point in part.GetPoints())
{
var vertex = new Graphic()
{
Symbol = generalizedMarkerSymbol,
Geometry = point
};
generalizedGraphicsLayer.Graphics.Add(vertex);
}
}
}
}
catch (Exception ex)
{
var _x = new MessageDialog("Error generalizing line: " + ex.Message, "Sample Error").ShowAsync();
}
}
// Generalizes the original line graphic
private void GeneralizeButton_Click(object sender, RoutedEventArgs e)
{
try
{
_generalizedGraphicsLayer.Graphics.Clear();
var offset = DistanceSlider.Value * 1000;
var generalizedPolyline = GeometryEngine.Generalize(_originalGraphicsLayer.Graphics[0].Geometry, offset, false) as Polyline;
if (generalizedPolyline != null)
{
var graphic = new Graphic(generalizedPolyline, _generalizedLineSymbol);
_generalizedGraphicsLayer.Graphics.Add(graphic);
foreach (var path in generalizedPolyline)
{
foreach (var coord in path)
{
var vertex = new Graphic(new MapPoint(coord, mapView.SpatialReference), _generalizedMarkerSymbol);
_generalizedGraphicsLayer.Graphics.Add(vertex);
}
}
}
}
catch (Exception ex)
{
var _ = new MessageDialog("Error generalizing line: " + ex.Message, "Sample Error").ShowAsync();
}
}
private void GeneralizeButton_Click(object sender, RoutedEventArgs e)
{
generalizedGraphicsLayer.Graphics.Clear();
//GeneralizeButton.IsEnabled = false;
var offset = DistanceSlider.Value * 1000;
var generalizedGeometry = GeometryEngine.Generalize(originalGraphicsLayer.Graphics[0].Geometry, offset, false);
generalizedGraphicsLayer.Graphics.Clear();
if (generalizedGeometry != null)
{
var g = new Graphic();
g.Symbol = generalizedLineSymbol;
g.Geometry = generalizedGeometry;
g.Geometry.SpatialReference = mapView1.SpatialReference;
generalizedGraphicsLayer.Graphics.Add(g);
foreach (var pc in (generalizedGeometry as Polyline).Paths)
{
foreach (var point in pc)
{
var vertice = new Graphic()
{
Symbol = generalizedMarkerSymbol,
Geometry = new MapPoint(point.X, point.Y)
};
generalizedGraphicsLayer.Graphics.Add(vertice);
}
}
}
}
// myMapView 事件
private async void MyMapView_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
IInputElement ie = (IInputElement)(sender);
MapPoint loc = myMapView.ScreenToLocation(e.GetPosition(ie));
switch (operation)
{
case OperateType.DrawPoint: //画点
Graphic pt = new Graphic(loc, pointSymbol);
graphicsLayer.Graphics.Add(pt);
break;
case OperateType.DrawPolyline: //画线
pointCollection.Add(loc);
if (pointCollection.Count >= 2)
{
if (pointCollection.Count > 2)
{
Graphic g = graphicsLayer.Graphics[graphicsLayer.Graphics.Count - 1];
PolylineBuilder lb = new PolylineBuilder(pointCollection);
g.Geometry = lb.ToGeometry();
}
else
{
Esri.ArcGISRuntime.Geometry.Polyline l = new Esri.ArcGISRuntime.Geometry.Polyline(pointCollection);
Graphic lg = new Graphic(l, lineSymbol);
graphicsLayer.Graphics.Add(lg);
}
}
break;
case OperateType.DrawPolygon: //画多边形
pointCollection.Add(loc);
if (pointCollection.Count >= 3)
{
if (pointCollection.Count > 3)
{
Graphic g = graphicsLayer.Graphics[graphicsLayer.Graphics.Count - 1];
PolygonBuilder pb = new PolygonBuilder(pointCollection);
g.Geometry = pb.ToGeometry();
}
else
{
Esri.ArcGISRuntime.Geometry.Polygon p = new Esri.ArcGISRuntime.Geometry.Polygon(pointCollection);
Graphic pg = new Graphic(p, fillSymbol);
graphicsLayer.Graphics.Add(pg);
}
}
break;
case OperateType.None: //缺省状态
graphicsLayer.ClearSelection();
IdentifyGraphicsOverlayResult result = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
//选择图形元素
if (result.Graphics.Count < 1)
{
curSelGraphic = null;
EditVertexMenuItem.IsEnabled = false;
UneditVertexMenuItem.IsEnabled = false;
return;
}
curSelGraphic = result.Graphics.First();
curSelGraphic.IsSelected = true;
EditVertexMenuItem.IsEnabled = true;
break;
case OperateType.Cal_Clip: //选择图形
IdentifyGraphicsOverlayResult gResult = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult.Graphics.Count < 1)
{
return;
}
Graphic selGraphic = gResult.Graphics.First();
selGraphic.IsSelected = true; listOfClipGraphics.Add(selGraphic); //记录所选图形
if (listOfClipGraphics.Count == 2) //图形数目为2时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
Graphic g2 = listOfClipGraphics[1];
if (g1.Geometry.GeometryType != GeometryType.Polygon || g2.Geometry.GeometryType != GeometryType.Polygon) //如果所选图形不是多边形，则退出
{
MessageBox.Show("请选择两个多边形图形！");
listOfClipGraphics.Clear();
graphicsLayer.ClearSelection();
return;
}
Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Clip(g1.Geometry, g2.Geometry.Extent); //执行剪切操作
if (resultGeometry != null) //处理结果
{
graphicsLayer.Graphics.Remove(g1); //从图形层中移除原图形
graphicsLayer.Graphics.Remove(g2);
Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic); operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Union: // 联合
IdentifyGraphicsOverlayResult gResultUnion = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResultUnion.Graphics.Count < 1)
{
return;
}
Graphic selGraphicUnion = gResultUnion.Graphics.First();
selGraphicUnion.IsSelected = true;
listOfClipGraphics.Add(selGraphicUnion); //记录所选图形
if (listOfClipGraphics.Count == 2) //图形数目为2时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
Graphic g2 = listOfClipGraphics[1];
if (g1.Geometry.GeometryType != GeometryType.Polygon || g2.Geometry.GeometryType != GeometryType.Polygon) //如果所选图形不是多边形，则退出
{
MessageBox.Show("请选择两个多边形图形！");
listOfClipGraphics.Clear();
graphicsLayer.ClearSelection();
return;
}
Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Union(g1.Geometry, g2.Geometry.Extent); //执行剪切操作
if (resultGeometry != null) //处理结果
{
graphicsLayer.Graphics.Remove(g1); //从图形层中移除原图形
graphicsLayer.Graphics.Remove(g2);
Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Cut: // 剪切
IdentifyGraphicsOverlayResult gResult_Cut = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult_Cut.Graphics.Count < 1)
{
return;
}
Graphic selGraphic_Cut = gResult_Cut.Graphics.First();
selGraphic_Cut.IsSelected = true;
listOfClipGraphics.Add(selGraphic_Cut); //记录所选图形
if (listOfClipGraphics.Count == 2) //图形数目为1时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
Graphic g2 = listOfClipGraphics[1];
if (g1.Geometry.GeometryType != GeometryType.Polygon || g2.Geometry.GeometryType != GeometryType.Polyline) //如果所选图形不是多边形，则退出
{
MessageBox.Show("请先选择一个面要素后再选择一个线要素.");
listOfClipGraphics.Clear();
graphicsLayer.ClearSelection();
return;
}
Esri.ArcGISRuntime.Geometry.Polyline polyLine = (Esri.ArcGISRuntime.Geometry.Polyline)g2.Geometry;
Esri.ArcGISRuntime.Geometry.Geometry[] resultGeometry = GeometryEngine.Cut(g1.Geometry, polyLine); //执行剪切操作
if (resultGeometry != null) //处理结果
{
graphicsLayer.Graphics.Remove(g1);
for (int z = 0; z < resultGeometry.Length; z++)
{
Graphic clipedGraphic = new Graphic(resultGeometry[z], fillSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
}
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Simplify: // 拓扑纠正
IdentifyGraphicsOverlayResult gResult_Simplify = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult_Simplify.Graphics.Count < 1)
{
return;
}
Graphic selGraphic_Simplify = gResult_Simplify.Graphics.First();
selGraphic_Simplify.IsSelected = true;
listOfClipGraphics.Add(selGraphic_Simplify); //记录所选图形
if (listOfClipGraphics.Count == 1) //图形数目为1时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
if (g1.Geometry.GeometryType == GeometryType.Point) //如果所选图形不是多边形，则退出
{
MessageBox.Show("请先选择一个面要素或线要素.");
listOfClipGraphics.Clear();
graphicsLayer.ClearSelection();
return;
}
Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Simplify(g1.Geometry); //执行剪切操作
if (resultGeometry != null) //处理结果
{
graphicsLayer.Graphics.Remove(g1); //从图形层中移除原图形
Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Gene: // 简化
IdentifyGraphicsOverlayResult gResult_Gene = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult_Gene.Graphics.Count < 1)
{
return;
}
Graphic selGraphic_Gene = gResult_Gene.Graphics.First();
selGraphic_Gene.IsSelected = true;
listOfClipGraphics.Add(selGraphic_Gene); //记录所选图形
if (listOfClipGraphics.Count == 1) //图形数目为1时
{
Graphic g1 = listOfClipGraphics[0];
if (g1.Geometry.GeometryType == GeometryType.Point) //如果所选图形是点，则退出
{
MessageBox.Show("请先选择一个面要素或线要素.");
listOfClipGraphics.Clear();
graphicsLayer.ClearSelection();
return;
}
Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Generalize(g1.Geometry, 1000000.0, true); //执行剪切操作
if (resultGeometry != null) //处理结果
{
MessageBox.Show(resultGeometry.ToJson() + "\n" + resultGeometry.GeometryType);
graphicsLayer.Graphics.Remove(g1); //从图形层中移除原图形
Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Buff: // 缓冲
IdentifyGraphicsOverlayResult gResult_Buff = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult_Buff.Graphics.Count < 1)
{
return;
}
Graphic selGraphic_Buff = gResult_Buff.Graphics.First();
selGraphic_Buff.IsSelected = true;
listOfClipGraphics.Add(selGraphic_Buff); //记录所选图形
if (listOfClipGraphics.Count == 1) //图形数目为1时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Buffer(g1.Geometry, 1000000.0); //执行剪切操作
if (resultGeometry != null) //处理结果
{
graphicsLayer.Graphics.Remove(g1); //从图形层中移除原图形
Graphic clipedGraphic = new Graphic(resultGeometry, new SimpleFillSymbol(SimpleFillSymbolStyle.Solid, Color.FromArgb(125, 255, 250, 0), new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.FromArgb(0, 0, 0), 4.0))); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Jiaodian: // 交点
IdentifyGraphicsOverlayResult gResult_Jiaodian = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult_Jiaodian.Graphics.Count < 1)
{
return;
}
Graphic selGraphic_Jiaodian = gResult_Jiaodian.Graphics.First();
selGraphic_Jiaodian.IsSelected = true;
listOfClipGraphics.Add(selGraphic_Jiaodian); //记录所选图形
if (listOfClipGraphics.Count == 2) //图形数目为1时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
Graphic g2 = listOfClipGraphics[1];
IReadOnlyList <Geometry> resultGeometry = GeometryEngine.Intersections(g1.Geometry, g2.Geometry); //执行剪切操作
if (resultGeometry != null) //处理结果
{
Graphic clipedGraphic = new Graphic(resultGeometry[0], pointSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
}
}